oil for break-in

[Jtgrant]

I have setup a Ford 8.8 IRS center section with new FRPP 327 gears, New Traclock and bearings. I will run Amsoil Severe gear 75w-140 after the break-in. I was thinking of using Rotella gear oil conventional 85-140 from walmart with Ford friction modifier for the break-in. Run for 100 miles change it with the same, then 400 miles. Then run the Amsoil.

Or break it in on Mobil 1 syn 75w-90?

Any suggestions?

 

[glum]

Royal Purple Break-In Oil

[glum packs up and leaves the country to go into hiding for suggesting an RP product...]

 

[Jtgrant]

That is for engine break-in. Not something designed for gears.

 

[mopar_monkey]

just use what ever you can get for cheap and change it out in 3oo mi.

 

[glum]

Sorry, totally misread the first post. Actually I can't remember if I read it at all. Either way, I blame the wine.

 

[electrolover]

mobil sounds good. so does synpower or syntec.

dont forget friction modifier

 

[Jtgrant]

Yup I also purchased 2 bottles of the Ford Friction Modifier. One to use for break-in and one after break-in if the clutches start to chatter.
I think I will use the Mobil 1 lighter weight gear oil for break-in since I will be driving easy and its 10 bucks cheaper than the 75-140 Mobil 1.

 

[mechtech2]

Let it break in.
100 and 400 ? Too soon.
Street car? 1000 and 4,000 maybe.
A good gear set up is assumed [shim, adj., preload, etc.].

 

[bdcardinal]

Did you drill to add a drain plug or are you sucking it all out? What is this going in? just curious.

If this is going in a track car you might want to consider adding a cooler such as Maximum Motorsports kit.

 

[Eddie]

I think 1000 first and then every 25,000 miles. I'd use what ever you plan to ultimately use for the break-in.